<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>变量修饰符</title>
    <script>
      let a = 10;//声明一个局部变量

      const INFO = "sysInfo";


      const arr = new Array(6);

     let brr = new Array(88);



        console.log(arr.length)



    </script>
</head>
<body>

</body>
</html>